The bone of contention for both lawsuits seems to be Viacom’s recalculation of Rock Band‘s true worth; Viacom, which has failed to make profit from the game thanks to increased production costs and falling sales, is actually trying to sell the franchise and claims that it is actually owed refunds on performance payments it has previously paid thanks to the underperformance of the franchise. The lawsuits against Viacom allege that the company not only still owes hundreds of millions of dollars in performance payments, but that it also held back $12 million of the original purchase payment unfairly.

Unsurprisingly, Viacom claims that the lawsuits are attempts to rewrite initial contracts, and promises to “defend this [lawsuit] vigorously.”